An insect's exoskeleton is a noncellular layer composed of a material called ____________________, which is secreted by an inner layer of cells
Fill in the blank(s) with correct word
chitin
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Decreased pressure in a water supply system resulting from the water passing through fittings, meters, and other devices is referred to as _____.
a. system drop b. fittings loss c. drag loss d. pressure drop
For long-term cutting of materials containing cadmium or mercury, always wear an approved _____.
a. supplied air respirator b. metal-fume filter c. HEPA-rated filter d. standard respirato
What are common foods for chinchillas?
What will be an ideal response?
The care and maintenance of plants encourage ____, which helps residents of adult living centers who
need to gain maintain flexibility.
a. mental stimulation b. standing, stretching, bending, and reaching c. recall of fond memories d. lively social interaction